Question

if radius of a circle is 1 cm then the circumference of its semi circle is _____ cm​

Answer 1

The circumference of its semi-circle is 3.14cm.

Given:

The radius of a circle is 1 cm.

To Find:

The circumference of its semi circle.

Solution:

To find the circumference of its semi-circle is we will follow the following steps:

As we know,

The circumference is the boundary of the figure and is the same as the perimeter.

For example, the circumference or perimeter of a square is the sum of all its sides.

Similarly,

The circumference of the circle is 2πr.

Circumference the of semicircle is half the circumference of the circle = πr

So,

Circumference of semicircle = 3.14×1 = 3.14cm.

Henceforth, the circumference of its semi-circle is 3.14cm.